Reliable space Boost converter enabled with an energy conservation-based mathematical framework

Boost converters with unique voltage step-up capacities are key components of modern electrification and intelligent technologies. However, the existing Boost converter models relying on steady-state assumptions fail to predict transient dynamics during input voltage or load fluctuations, so the Boost converters designed based on existing models often exhibit substantial output voltage overshoots, leading to failures of whole electrical systems. This study introduces an energy conservation-based mathematical framework (ECMF) for Boost converters by incorporating non-ideal component coupling. As compared to the existing models, the proposed ECMF reduces steady-state and dynamic-state errors between experimental and simulated output voltages by factors of 11.0 (from 20.9% to 1.9%) and 15.4 (from 77.1% to 5.0%) under input voltage variations, and by factors of 10.2 (from 15.3% to 1.5%) and 35.1 (from 42.1% to 1.2%) under load changes, respectively. Further, the quantitative relations between individual parameters and output voltages were systematically investigated and delineated overshoot mitigation strategies were developed for representative scenarios for the first time. Consequently, a highly reliable Boost converter is accordingly designed and on-orbit deployed for accurate energy conversions in space.